Hotmail to Yahoo emails

[DiscoStu]

My girlfriend has 2 Yahoo accounts, but neither of them are receiving emails from Hotmail addresses. I've tried sending to her from my Hotmail account and I'm getting delivery delay notices too.
Anyone else having this problem and do you know what's causing it? Is it getting fixed? She's worried she's losing business emails.

[RATTER15]

Ive had exactly the same problem, I have no idea what the solution is!!!